Comprehensive Authorization & Access Control Guide
Comprehensive Authorization & Access Control Guide A practitioner’s reference for Broken Access Control (OWASP A01) — the models, bug classes, bypass techniques, real-world chains, and detection/prevention patterns that matter in modern web and API testing. Compiled from 33 research sources. Table of Contents Fundamentals Authorization Models Attack Surface & Discovery Vertical Privilege Escalation Horizontal Privilege Escalation & IDOR/BOLA Broken Function Level Authorization URL, Method & Header Bypasses Parameter & Keyword Bypasses JWT & Token Claim Manipulation OAuth Scope & Redirect Abuse Multi-Tenant & Session Isolation Failures Cloud & AI Agent Authorization Real-World CVEs and Chains Tools & Automation Detection & Prevention Testing Methodology Quick Reference 1. Fundamentals Access control is the application of constraints on who or what is authorized to perform actions or access resources. It sits on top of two related primitives: ...